Case 2 – old

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Cause of Defects

  • Lack of provision or failure of a waterproofing membrane around the pipe may lead the water leakage through the structural floor (Figure 1).
  • Aging of the waterproofing membrane could lead to failure of water-tightness of the discontinuity at the penetration.
  • Porous infill of the cold joint at the penetration attributes by the hacking of concrete slab and/or leaving large openings during casting could be another factor.